tests: adjust type for new compiler wanring

Preserve the const-ness of the string constants as identified by the newer
compiler.

Author: compnerd

tests/dispatch_context_for_key.c

@@ -31,7 +31,7 @@
 
 #if DISPATCH_API_VERSION >= 20100825 && DISPATCH_API_VERSION != 20101110
 
-static char *ctxts[] = {"ctxt for app", "ctxt for key 1",
+static const char *ctxts[] = {"ctxt for app", "ctxt for key 1",
 		"ctxt for key 2", "ctxt for key 1 bis", "ctxt for key 4"};
 volatile long ctxts_destroyed;
 static dispatch_group_t g;
@@ -58,20 +58,20 @@ test_context_for_key(void)
 	dispatch_queue_t ttq = dispatch_get_global_queue(0, 0);
 	dispatch_group_enter(g);
 #if DISPATCH_API_VERSION >= 20101011
-	dispatch_queue_set_specific(tq, &ctxts[4], ctxts[4], destructor);
+	dispatch_queue_set_specific(tq, &ctxts[4], (char *)ctxts[4], destructor);
 #else
 	dispatch_set_context_for_key(tq, &ctxts[4], ctxts[4], ttq, destructor);
 #endif
 	dispatch_set_target_queue(tq, ttq);
 	dispatch_group_enter(g);
-	dispatch_set_context(q, ctxts[0]);
+	dispatch_set_context(q, (char *)ctxts[0]);
 	dispatch_set_target_queue(q, tq);
 	dispatch_set_finalizer_f(q, destructor);
 
 	dispatch_async(q, ^{
 		dispatch_group_enter(g);
 #if DISPATCH_API_VERSION >= 20101011
-		dispatch_queue_set_specific(q, &ctxts[1], ctxts[1], destructor);
+		dispatch_queue_set_specific(q, &ctxts[1], (char *)ctxts[1], destructor);
 #else
 		dispatch_set_context_for_key(q, &ctxts[1], ctxts[1], ttq, destructor);
 #endif
@@ -80,7 +80,7 @@ test_context_for_key(void)
 	dispatch_async(dispatch_get_global_queue(0, 0), ^{
 		dispatch_group_enter(g);
 #if DISPATCH_API_VERSION >= 20101011
-		dispatch_queue_set_specific(q, &ctxts[2], ctxts[2], destructor);
+		dispatch_queue_set_specific(q, &ctxts[2], (char *)ctxts[2], destructor);
 #else
 		dispatch_set_context_for_key(q, &ctxts[2], ctxts[2], ttq, destructor);
 #endif
@@ -114,7 +114,7 @@ test_context_for_key(void)
 		dispatch_group_enter(g);
 		void *ctxt;
 #if DISPATCH_API_VERSION >= 20101011
-		dispatch_queue_set_specific(q, &ctxts[1], ctxts[3], destructor);
+		dispatch_queue_set_specific(q, &ctxts[1], (char *)ctxts[3], destructor);
 		ctxt = dispatch_queue_get_specific(q, &ctxts[1]);
 #else
 		dispatch_set_context_for_key(q, &ctxts[1], ctxts[3], ttq, destructor);

tests/dispatch_data.c

@@ -43,9 +43,9 @@ test_concat(void)
 {
 	dispatch_group_enter(g);
 	dispatch_async(dispatch_get_main_queue(), ^{
-		char* buffer1 = "This is buffer1 ";
+		const char* buffer1 = "This is buffer1 ";
 		size_t size1 = 17;
-		char* buffer2 = "This is buffer2 ";
+		const char* buffer2 = "This is buffer2 ";
 		size_t size2 = 17;
 		__block bool buffer2_destroyed = false;
 

tests/dispatch_io_muxed.c

@@ -47,21 +47,21 @@ test_file_muxed(void)
 	printf("\nFile Muxed\n");
 
 #if defined(_WIN32)
-	char *temp_dir = getenv("TMP");
+	const char *temp_dir = getenv("TMP");
 	if (!temp_dir) {
 		temp_dir = getenv("TEMP");
 	}
 	if (!temp_dir) {
 		test_ptr_notnull("temporary directory", temp_dir);
 		test_stop();
 	}
-	char *path_separator = "\\";
+	const char *path_separator = "\\";
 #else
-	char *temp_dir = getenv("TMPDIR");
+	const char *temp_dir = getenv("TMPDIR");
 	if (!temp_dir) {
 		temp_dir = "/tmp";
 	}
-	char *path_separator = "/";
+	const char *path_separator = "/";
 #endif
 	char *path = NULL;
 	asprintf(&path, "%s%sdispatchtest_io.XXXXXX", temp_dir, path_separator);